O-Ring Applications Based on Temperature – A Complete Guide

O-rings are essential sealing components used across various industries, including automotive, chemical, pharmaceutical, household appliances, and heavy industry. One of the most important factors determining the effectiveness of O-rings is the material they are made from and the temperature range in which they operate. In this article, we present different types of O-rings and their applications based on temperature.

How to Choose the Right O-Ring for Temperature?

Selecting the right O-ring depends on working conditions such as temperature and the medium the seal will protect. Here are some guidelines:

• NBR O-Rings – These are the most popular choice for applications up to +90°C. Ideal for automotive, hydraulic, and oil systems, NBR O-rings are flexible and resistant to lubricants and oils but not suitable for glycol-based brake fluids.

• HNBR O-Rings – Withstanding higher temperatures (up to +150°C), HNBR is resistant to oils, fuels, and acids with high sulfur content, making it perfect for air conditioning systems and industrial machinery.

• EPDM O-Rings – Used in brake systems and household appliances, EPDM O-rings resist temperatures up to +150°C. They are resistant to brake fluids, steam, and detergents, commonly found in washing machines and dishwashers.

• Viton® (FKM/FPM) O-Rings – Viton O-rings provide excellent chemical and heat resistance, making them suitable for aviation, automotive, and chemical applications. They can withstand temperatures up to +210°C and are used in fuel systems and vacuum applications.

• Silicone (VMQ/FVMQ) O-Rings – With a temperature range up to +240°C, silicone O-rings are widely used in the food, pharmaceutical, and appliance industries. Due to their low wear resistance, they are mainly used in static applications.

• PTFE (Teflon) O-Rings – PTFE O-rings are resistant to almost all chemicals and can work at temperatures up to +260°C. They are used in chemical, pharmaceutical, and petrochemical industries, where high chemical resistance is required.

• Kalrez® (FFKM) O-Rings – These high-performance seals withstand temperatures up to +327°C and are used in extreme environments such as oil rigs, semiconductor production, and aerospace industries.

FAQ:

1. What O-ring is best for high-temperature applications?
   The best choices are FPM (Viton®) O-rings, which can operate in temperatures up to +210°C, and FFKM (Kalrez®), which can handle up to +327°C.

2. Are silicone O-rings suitable for hot water?
   Yes, silicone O-rings (VMQ) are resistant to water up to +100°C, making them ideal for appliances and the food industry.

3. Are NBR O-rings oil-resistant?
   Yes, NBR O-rings have excellent resistance to oils, fuels, and lubricants, making them perfect for hydraulic and oil systems.

4. Which O-rings are chemical-resistant?
   PTFE (Teflon) and FFKM (Kalrez®) O-rings are the most chemical-resistant, making them ideal for use in chemical and pharmaceutical industries.

5. Where can I buy high-temperature-resistant O-rings?
   At Simmering.pl, we offer a wide selection of O-rings made from different materials that can withstand a broad range of temperatures and conditions.

Keywords:

O-Rings, NBR, FPM, HNBR, EPDM, PTFE, Viton, Elastomers, Sealing Materials, Silicone O-Rings, Industrial O-Rings, Automotive O-Rings, Seals, Simmering.pl